Performs an xpath search on a certain content.
The search is relative to the root element of the $content variable.
string $content: The html to parse.
string $xpath: The xpath string to use in the search.
array $arguments: Some arguments for the xpath.
array|FALSE The return value of the xpath search. For details on the xpath string format and return values see the SimpleXML documentation, http://php.net/manual/function.simplexml-element-xpath.php.
protected function xpathContent($content, $xpath, array $arguments = array()) {
if ($elements = $this
->parseContent($content)) {
$xpath = $this
->buildXPathQuery($xpath, $arguments);
$result = $elements
->xpath($xpath);
// Some combinations of PHP / libxml versions return an empty array
// instead of the documented FALSE. Forcefully convert any falsish values
// to an empty array to allow foreach(...) constructions.
return $result ? $result : array();
}
else {
return FALSE;
}
}